EP1346846A2 - Sleeve for flexographic printing - Google Patents
Sleeve for flexographic printing Download PDFInfo
- Publication number
- EP1346846A2 EP1346846A2 EP03004728A EP03004728A EP1346846A2 EP 1346846 A2 EP1346846 A2 EP 1346846A2 EP 03004728 A EP03004728 A EP 03004728A EP 03004728 A EP03004728 A EP 03004728A EP 1346846 A2 EP1346846 A2 EP 1346846A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- sleeve according
- conductive
- sleeve body
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012811 non-conductive material Substances 0.000 claims description 11
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000011152 fibreglass Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000004922 lacquer Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 239000000976 ink Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 241000209035 Ilex Species 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 238000007600 charging Methods 0.000 description 2
- 238000004200 deflagration Methods 0.000 description 2
- 238000007786 electrostatic charging Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- -1 carboxylic acid ethers Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/18—Curved printing formes or printing cylinders
- B41C1/182—Sleeves; Endless belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F27/00—Devices for attaching printing elements or formes to supports
- B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
- B41F27/105—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders for attaching cylindrical printing formes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/24—Rotary letterpress machines for flexographic printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/16—Curved printing plates, especially cylinders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/18—Curved printing formes or printing cylinders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/02—Top layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2200/00—Printing processes
- B41P2200/10—Relief printing
- B41P2200/12—Flexographic printing
Definitions
- the invention relates to a sleeve for flexographic printing, with a Sleeve body from at least partially electrically not conductive material with its inside on a as Air cylinder designed, electrically on the outer wall of the roller conductive support roller of a printing press is mountable and in the assembled state at least one contact zone with the support roller having.
- sleeves for flexographic printing with wall thicknesses of more at least one compressible soft foam layer is also considered to be 5 mm provided to despite the considerable wall thickness the expansion of the sleeve body during assembly or disassembly to ensure.
- sleeve variants at which the entire wall structure is made of compressible material is. After completing the assembly and switching off the Compressed air sits the sleeve with a press fit on the outer wall of the roller the support roller and is held on it in a rotationally fixed manner.
- Electrostatic charges can occur in different areas of the printing press. You can e.g. between the substrate to be printed, e.g. a film and the printing form due to the lifting movement and caused by excessive charging of the paint. If none appropriate protective measures are taken, potentiate themselves with an increasing number of printing units, the electrostatic Charges as the substrate to be printed progresses in the machine, so that in the machine direction rear printing units dangerous discharges into the ink fountains and or can occur in the chambered doctor blade.
- Suitable electrostatic charges can be Adaptation of the environmental conditions, especially compliance an air humidity of about 65% and / or ionization of the Limit air in the work area.
- the object of the invention is to provide a sleeve for flexographic printing create the one hand at least partially electric non-conductive material, so that their assembly after Air cushion principle can be done, and the same time minimizes the problem of electrostatic charges or avoids.
- the sleeves made of (partially) non-conductive material to give electrically conductive structure, through which the inevitable electrostatic charges directly over the carrier roller be derived so that the charge of each Sleeves or application rollers in the printing unit do not reach a size can be used for a discharge, ignition or deflagration the solvent is sufficient, and not to subsequent ones Printing units is passed on.
- the sleeve is provided with an electrically conductive surface is electrical with the contact zone via at least one conductive element arranged in the sleeve body for Dissipation of electrostatic charges in the outer wall of the roll the support roller is connected.
- the electrically conductive surface is the sleeve and therefore the sleeve for flexographic printing over the element arranged in the sleeve body and the roller outer wall the carrier roller is grounded.
- the sleeves according to the invention get an electrically conductive structure without losing their weight increases. The low weight desired by the user can also be achieved or maintained with the sleeves according to the invention become.
- electrically conductive should refer in particular to substances or materials whose specific resistance is less than 10 4 ⁇ m. Since it is important for the invention to discharge the electrostatic charge, electrically conductive substances or materials may also include those which are electrically conductive and whose specific resistance is between 10 4 ⁇ m and approximately 10 9 ⁇ m. Accordingly, those substances and materials whose specific resistance is greater than 10 4 ⁇ m or which are neither conductive nor dissipative are not conductive.
- the electrically conductive surface of the sleeve can be different Wise men are formed or applied.
- a varnish can be mixed, for example with conductive particles such as carbon black or with metal pigments such as silver or copper and the like. the desired conductivity receive.
- the plastic layer can in particular also made of glass fiber reinforced plastic (GRP) conductive matrix or from one due to the carbon fibers conductive carbon fiber reinforced plastic (CFRP).
- GRP glass fiber reinforced plastic
- CFRP carbon fiber reinforced plastic
- the sleeve body can on its outer surface with a metallic coating forming the surface of the sleeve be provided. It is useful for this, for example to steam the sleeve body with suitable metal. Either the application of the conductive lacquer as well as the application of a metallic coating allow existing ones Retrofit sleeves for flexographic printing and in a sleeve service should subsequently be made conductive.
- the electrical conductivity of the sleeve can alternatively also can be achieved in that the sleeve body made of a composite material with electrically conductive, a braid of Inserts forming connecting elements.
- the sleeve body can be made from a metal fiber or carbon fiber reinforced plastic (CFRP), care must be taken when manufacturing the sleeve, that the deposits or fibers are not only axial, but also extend radially from the contact surface to the surface.
- CFRP carbon fiber reinforced plastic
- a sleeve made entirely of CFRP is only small Wall thicknesses up to 5 mm can be installed. With larger wall thicknesses is usually already to widen the sleeve for assembly to ensure or disassembly, the sleeve body with at least a layer of non-conductive compressible material Mistake.
- the invention provides that the layer of non-conductive material from the Element for dissipating electrostatic charges penetrated is.
- a sleeve with a non-conductive, cylindrical layer or intermediate layer is the element in a radially extending Recess arranged in the sleeve body.
- the recess can here are formed in particular by a radial bore.
- the discharge element for electrostatic charging not the compressibility of the layer of non-conductive material is disabled in this embodiment is special favorable if the element change its length in the radial direction can and independently after assembly on the electrical Connection sets the necessary length.
- This can preferably be achieved in that the element spring-loaded contact body.
- the contact body is arranged such that it protrudes beyond the inside of the sleeve body before assembly. With the spring, the contact body is thus in the direction pre-tensioned on the inside of the sleeve, i.e. in the assembled state pressed against the outer roller wall of the support roller, so that the electrically conductive connection between the conductive Surface of the sleeve and the electrically conductive support roller is guaranteed.
- the contact body of a Ball is formed or at least a spherical contact end having.
- an electrically conductive housing e.g. made of metal have, which receives the spring and the contact body and with its case bottom with the conductive surface connected is.
- a sleeve body can be made of this non-conductive material subsequently with at least one radial Through hole are provided in which an element for electrostatic discharge before applying the conductive Surface is used.
- the item can be in the Through hole or the recess in particular screwed or be glued in.
- Recess or through hole on the inside of the sleeve body is lowered so that during assembly or disassembly the sleeve between the inside of the sleeve body and air cushions created by the support roller do not move or loosen the element or its housing can.
- the contact zone does not necessarily have to be on the inside of the Sleeve lying.
- Most of the support rollers have a centering projection for the register setting on which the sleeve is centered with a centering recess during assembly.
- the contact zone can therefore Be part of the centering recess, with the other
- the advantage is that the compressibility of the intermediate layer is not affected.
- To contact the contact zone to ensure with the centering projection, in the centering recess is provided with spring-loaded contact elements become.
- the sleeve body can be used as an element for the electrostatic discharge at least one tendon made of conductive Material, in particular made of metal.
- reference number 10 is a sleeve for the Flexographic printing, which is based on the air cushion principle on a shown exclusively in Fig. 3, as an air cylinder Carrying roller 1 executed a flexographic printing machine, not shown is mountable.
- the sleeve 10 has a cylindrical Sleeve body 2 with a multilayer structure. With the sleeve 10 can in particular be a so-called build-up sleeve act.
- the sleeve body 10 can e.g. a base sleeve have glass fiber reinforced plastic with several Layers such as compressible soft foam, LD casting compound, Hard foam and a hard coat or soft coat top layer is. The selection of the top layer then depends the type and attachment of those used for printing, not illustrated printing forms.
- the sleeve body 2 either completely made of electrically non-conductive material, or the sleeve body 2 has a continuous intermediate layer made of electrically non-conductive material, the one Insulation between the outside 3 of the sleeve body 2 and its inside 4 causes.
- a layer 5 of electrical according to the invention conductive material applied. With layer 5 it can e.g. a vapor-deposited metal coating or one Act as a conductive lacquer. Due to the layer 5, the sleeve 10 over the entire circumference and its entire axial length electrically conductive surface 6.
- the sleeve body 2 there is at least one with reference numerals 20 designated element for discharging electrostatic Charges from the surface 6 of the sleeve 10 to the inside 4 provided.
- the element 20 is in a radial bore 23 arranged in the sleeve body 2, which on the inside 4 of the Sleeve body 2 is open and to the outside of the electrical conductive layer 5 is covered.
- Element 20 comprises a contact body shown here as ball 21, with a spring 22 in the direction of the inside 4 of the adapter sleeve is biased. Ball 21 and spring 22, both are electrically conductive, are not shown in a further arranged electrically conductive housing, which in the radial bore 23 is inserted.
- the housing and the associated radial bore 23 are designed such that the ball 21st by applying a radial force completely in can immerse the sleeve body 2. This radial force arises inevitably after the assembly of the sleeve 10 the support roller 1, as shown in FIG. 3.
- the end collar of the housing is preferably arranged in such a way that it is not up to the inside 4 of the sleeve body 2nd zoom ranges. Furthermore, the through hole 23 with a Countersink or step to be provided during sleeve assembly on the support roller 1 a loosening or moving the element 20 to prevent by the air cushion.
- Fig. 3 shows the sleeve 10 in the assembled state on the support roller 1. Since the inside 4 of the sleeve 10 and the roller outer wall 7 of the support roller 1 are cylindrical, arises from the full axial length a contact zone between sleeve 10 and Carrier roller 1. The air system of the carrier roller 1 is not shown. As can be clearly seen in FIG. 3, the ball 21 dips completely into the radial bore 23, but is by means of the spring 22 pressed against the roller outer wall 7 of the support roller 1. Electrostatic charges are on the surface 6 or the layer 5, the spring 22 and the ball 23 for Outer wall 7 of the support roller 1 forwarded and from there on the jacket of the support roller 1, as symbolic with the line 8 in Fig. 3 clarified, derived from all printing units.
- the embodiment shown in the figures is only an example and is intended to protect the scope of the registered invention not restrict.
- the invention can be applied to new sleeves be realized.
- the element for discharging electrostatic Charges can also be added to existing ones Sleeves made of non-conductive material can be installed. From the idea of the invention therefore also includes a method with which sleeves can subsequently be made conductive, by covering the outside with an electrically conductive layer is provided and an element is installed in the sleeve body which is the electrically conductive connection between the Guaranteed inside of the sleeve and its surface.
- the invention is also not limited to that the sleeve is arranged directly on the air cylinder. Therefore, are intended to fall within the scope of the appended claims also fall in embodiments in which the sleeve Intermediate layer of a so-called adapter sleeve on the air cylinder a printing press is mountable.
- the adapter sleeve is electrical conductive and the element is at the contact zone between the inside of the sleeve and the outside of the adapter sleeve, or the adapter sleeve is not electrically conductive and the element for dissipating electrostatic charges extends to the outer roller wall of the carrier roller. Further can also be in the adapter sleeve according to the invention dissipation of the electrostatic charge causing element be arranged.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Printing Plates And Materials Therefor (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
Description
Die Erfindung betrifft eine Hülse für den Flexodruck, mit einem Hülsenkörper aus wenigstens teilweise elektrisch nicht leitendem Material, der mit seiner Innenseite auf einer als Luftzylinder ausgeführten, an der Walzenaußenwand elektrisch leitfähigen Tragwalze einer Druckmaschine montierbar ist und im Montagezustand wenigstens eine Kontaktzone mit der Tragwalze aufweist.The invention relates to a sleeve for flexographic printing, with a Sleeve body from at least partially electrically not conductive material with its inside on a as Air cylinder designed, electrically on the outer wall of the roller conductive support roller of a printing press is mountable and in the assembled state at least one contact zone with the support roller having.
Bei der Bedruckung von Folien, Papierbögen, Papierblättern und anderen Substraten hat sich zunehmend der Einsatz sogenannter Sleeves (Arbeitshülsen) durchgesetzt, die unter Ausnutzung eines Luftkissens auf Tragwalzen der Druckmaschinen montiert werden und für den späteren Druckvorgang die Druckform, die aus Gummi oder anderem elastischem fotopolymeren Kunststoff besteht, tragen. Die Tragwalzen der Druckmaschinen, die fast durchweg von Stahlzylindern gebildet werden, sind hierzu mit einem internen, zu Bohrungen an der Walzenaußenwand führenden Luftsystem versehen, die beim axialen Aufschieben und Abziehen der Hülsen (Sleeves) mit Druckluft beaufschlagt werden, um den Hülsenkörper der Hülse geringfügig zu dehnen. Die Hülsenkörper der Hülsen bestehen insbesondere aus glasfaserverstärkten Kunststoffen, um diese Dehnungen reversibel aufnehmen zu können. Bei Hülsen für den Flexodruck mit Wandstärken von mehr als 5 mm wird zusätzlich wenigstens eine kompressible Weichschaumschicht vorgesehen, um trotz der erheblichen Wandstärke die Dehnung des Hülsenkörpers bei der Montage bzw. Demontage zu gewährleisten. Es sind auch Hülsenvarianten bekannt, bei denen der gesamte Wandaufbau aus kompressiblem Material hergestellt ist. Nach Beendigung der Montage und Abschalten der Druckluft sitzt die Hülse mit Preßsitz auf der Walzenaußenwand der Tragwalze und wird an dieser drehfest gehalten.When printing on foils, paper sheets, paper sheets and other substrates, the use of so-called Sleeves (working sleeves) enforced, taking advantage of a Air cushion mounted on the rollers of the printing machines and for the later printing process the printing form, the made of rubber or other elastic photopolymer plastic exists, wear. The support rollers of the printing presses, almost consistently formed by steel cylinders, are with this an internal one, leading to bores on the outside of the roller Air system provided, the axial pushing and pulling the sleeves are pressurized with compressed air in order to Stretch the sleeve body of the sleeve slightly. The sleeve body the sleeves consist in particular of glass fiber reinforced Plastics to reversibly absorb these strains. For sleeves for flexographic printing with wall thicknesses of more at least one compressible soft foam layer is also considered to be 5 mm provided to despite the considerable wall thickness the expansion of the sleeve body during assembly or disassembly to ensure. There are also known sleeve variants, at which the entire wall structure is made of compressible material is. After completing the assembly and switching off the Compressed air sits the sleeve with a press fit on the outer wall of the roller the support roller and is held on it in a rotationally fixed manner.
Zum Bedrucken der Folien, Papierbögen oder Papierbänder werden lösungsmittelhaltige Farben eingesetzt, wobei in der Flexodruckmaschine für jede Farbe ein als Druckwerk bezeichnetes Mehrwalzensystem mit Farbkasten und Rakel oder anderen geeigneten Farbauftragswerken eingesetzt wird. Bei modernen Flexodruckmaschinen besteht zunehmend Bedarf an einer großen Anzahl von Druckwerken bei gleichzeitig großformatigen Tragwalzen bzw. Hülsen. In Fachkreisen wurde bisher davon ausgegangen, daß beim Flexodruck aufgrund der geringen Anzahl der Druckwerke das Problem elektrostatischer Aufladungen vernachlässigbar ist und selbst bei den im Flexodruck verwendeten, brennbaren Lösungsmitteln wie z.B. Alkohole, Glykol- oder Karbonsäureesther nicht mit einer Zündung oder Verpuffung der Lösungsmittel in den Farben zu rechnen ist. Ein Grund hierfür mag in der geringen Anzahl der bisher in den Druckmaschinen vorhandenen Druckwerke gelegen haben.For printing on the foils, paper sheets or paper tapes Solvent-based inks are used, being in the flexographic printing press one for each color called a printing unit Multi-roller system with ink fountain and doctor blade or other suitable Ink coater is used. With modern flexographic printing machines there is an increasing need for a large number of printing units with large-format support rollers or sleeves. Experts have previously assumed that in flexographic printing due to the small number of printing units the problem of electrostatic charges is negligible and even with the flammable ones used in flexographic printing Solvents such as Alcohols, glycolic or carboxylic acid ethers not with ignition or deflagration of the solvents can be expected in the colors. One reason for this may be in the small number of those previously available in the printing press Printing units.
Höhere Anforderungen an die Arbeitssicherheit und der Bedarf an Flexodruckmaschinen mit einer größeren Anzahl von Druckwerken führen jedoch dazu, daß das Problem der elektrostatischen Aufladung auch bei Druckmaschinen für den Flexodruck nicht mehr vernachlässigbar ist. Elektrostatische Aufladungen können in unterschiedlichen Bereichen der Druckmaschine auftreten. Sie können z.B. zwischen dem zu bedruckenden Substrat wie z.B. einer Folie und der Druckform aufgrund der Abhebebewegung und durch übermäßige Aufladung der Farbe entstehen. Sofern keine geeigneten Schutzmaßnahmen getroffen werden, potenzieren sich bei einer steigenden Anzahl von Druckwerken die elektrostatischen Aufladungen mit dem Fortschreiten des zu bedruckten Substrats in der Maschine, so daß in den in Bearbeitungsrichtung hinteren Druckwerken gefährliche Entladungen in die Farbkästen und oder in den Kammerrakel auftreten können.Higher demands on occupational safety and the need on flexographic printing presses with a larger number of printing units however, lead to the problem of electrostatic No charging, even with printing machines for flexographic printing is more negligible. Electrostatic charges can occur in different areas of the printing press. You can e.g. between the substrate to be printed, e.g. a film and the printing form due to the lifting movement and caused by excessive charging of the paint. If none appropriate protective measures are taken, potentiate themselves with an increasing number of printing units, the electrostatic Charges as the substrate to be printed progresses in the machine, so that in the machine direction rear printing units dangerous discharges into the ink fountains and or can occur in the chambered doctor blade.
Grundsätzlich ist dem Fachmann bekannt, daß die Größe der Aufladung von der Oberflächenbeschaffenheit und der Leitfähigkeit des zu bedruckenden Substrates, ihrer Durchlaufgeschwindigkeit durch die Farbwerke, der Oberflächenbeschaffenheit, der Leitfähigkeit sowie der Funktionsweise der im Farbwerk eingesetzten Vorrichtungen (z.B. Rakel, Führungselemente, Farbkammer etc.) und auch den Umgebungsbedingungen in der Druckmaschine abhängen. Elektrostatische Aufladungen lassen sich durch geeignete Anpassung der Umgebungsbedingungen, insbesondere Einhalten einer Luftfeuchte von etwa 65% und/oder Jonisierung der Luft im Arbeitsraum begrenzen.In principle, the skilled worker is aware that the size of the charge on the surface quality and conductivity of the substrate to be printed, its throughput speed through the inking units, the surface quality, the conductivity as well as the functionality of those used in the inking unit Devices (e.g. doctor blade, guide elements, ink chamber etc.) and also the environmental conditions in the printing press depend. Suitable electrostatic charges can be Adaptation of the environmental conditions, especially compliance an air humidity of about 65% and / or ionization of the Limit air in the work area.
Aufgabe der Erfindung ist es, eine Hülse für den Flexodruck zu schaffen, die einerseits aus wenigstens teilweise elektrisch nicht leitendem Material besteht, so daß ihre Montage nach dem Luftkissenprinzip durchgeführt werden kann, und die gleichzeitig die Problematik elektrostatischer Aufladungen minimiert bzw. vermeidet.The object of the invention is to provide a sleeve for flexographic printing create the one hand at least partially electric non-conductive material, so that their assembly after Air cushion principle can be done, and the same time minimizes the problem of electrostatic charges or avoids.
Diese Aufgabe wird mit der in Anspruch 1 angegebenen Erfindung
gelöst. Vorteilhafte Ausführungsformen der Erfindung sind in
den Unteransprüchen angegeben. Erfindungsgemäß ist vorgesehen,
den Hülsen aus (teilweise) nicht leitendem Material einen
elektrisch leitenden Aufbau zu geben, durch den die unvermeidbaren
elektrostatischen Aufladungen unmittelbar über die Tragwalze
abgeleitet werden, so daß die Aufladung der einzelnen
Hülsen bzw. Auftragswalzen im Druckwerk nicht eine Größe erreichen
kann, die für eine Entladung, Zündung oder Verpuffung
der Lösungsmittel ausreicht, und auch nicht an nachfolgende
Druckwerke weitergereicht wird. Dies wird dadurch erreicht,
daß die Hülse mit einer elektrisch leitfähigen Oberfläche versehen
ist, die mit der Kontaktzone über wenigstens ein elektrisch
leitfähiges, im Hülsenkörper angeordnetes Element zur
Ableitung elektrostatischer Aufladungen in die Walzenaußenwand
der Tragwalze verbunden ist. Die elektrisch leitfähige Oberfläche
der Hülse und mithin die Hülse für den Flexodruck ist
über das im Hülsenkörper angeordnete Element und die Walzenaußenwand
der Tragwalze geerdet. Die erfindungsgemäßen Hülsen
erhalten einen elektrisch leitfähigen Aufbau, ohne-daß ihr Gewicht
zunimmt. Das vom Anwender gewünschte geringe Gewicht
kann auch mit den erfindungsgemäßen Hülsen erzielt bzw. beibehalten
werden.This object is achieved with the invention specified in
Im Rahmen der Offenbarung vorliegender Erfindung soll elektrisch leitfähig insbesondere solche Stoffe oder Materialien bezeichnen, deren spezifischer Widerstand geringer ist als 104 Ωm. Da es für die Erfindung auf das Ableiten der elektrostatischen Aufladung ankommt, können zu elektrisch leitfähigen Stoffen oder Materialien aber auch solche gehören, die elektrisch ableitend sind und deren spezifischer Widerstand zwischen 104 Ωm und etwa 109 Ωm liegt. Nicht leitfähig sind demgemäß solche Stoffe und Materialien, deren spezifischer Widerstand größer ist als 104 Ωm oder die weder leitfähig noch ableitfähig sind.Within the scope of the disclosure of the present invention, electrically conductive should refer in particular to substances or materials whose specific resistance is less than 10 4 Ωm. Since it is important for the invention to discharge the electrostatic charge, electrically conductive substances or materials may also include those which are electrically conductive and whose specific resistance is between 10 4 Ωm and approximately 10 9 Ωm. Accordingly, those substances and materials whose specific resistance is greater than 10 4 Ωm or which are neither conductive nor dissipative are not conductive.
Die elektrisch leitfähige Oberfläche der Hülse kann auf verschiedene Weisen gebildet bzw. aufgebracht werden. In einem Ausführungsbeispiel kann der Hülsenkörper an seiner Außenfläche mit einem die Oberfläche der Hülse bildenden leitfähigen Lack versehen werden. Ein Lack kann beispielsweise durch Vermischung mit leitfähigen Partikeln wie Ruß oder mit Metallpigmenten wie Silber oder Kupfer u.dgl. die gewünschte Leitfähigkeit erhalten. Alternativ kann die Oberfläche des Hülsenkörpers aus einer leitfähigen Kunststoffschicht, insbesondere einer leitfähigen Polyurethanschicht, bestehen, die bereits beim Aufbau (build-up) der Hülse vorgesehen wird oder erst nachträglich aufgebracht wird. Die Kunststoffschicht kann insbesondere auch aus glasfaserverstärktem Kunststoff (GFK) mit leitfähiger Matrix oder aus einem aufgrund der Kohlenfasern leitfähigen kohlenfaserverstärktem Kunststoff (CFK) bestehen. Weiter alternativ kann der Hülsenkörper an seiner Außenfläche mit einer die Oberfläche der Hülse bildenden metallischen Beschichtung versehen sein. Hierzu bietet es sich beispielsweise an, den Hülsenkörper mit geeignetem Metall zu bedampfen. Sowohl das Aufbringen des Leitlacks als auch das Aufbringen einer metallischen Beschichtung ermöglichen, bereits vorhandene Hülsen für den Flexodruck nachzurüsten und in einem Sleeveservice nachträglich leitfähig zu machen sollen.The electrically conductive surface of the sleeve can be different Wise men are formed or applied. In one Embodiment can the sleeve body on its outer surface with a conductive forming the surface of the sleeve Paint. A varnish can be mixed, for example with conductive particles such as carbon black or with metal pigments such as silver or copper and the like. the desired conductivity receive. Alternatively, the surface of the sleeve body from a conductive plastic layer, in particular one conductive polyurethane layer, which are already at Construction (build-up) of the sleeve is provided or only subsequently is applied. The plastic layer can in particular also made of glass fiber reinforced plastic (GRP) conductive matrix or from one due to the carbon fibers conductive carbon fiber reinforced plastic (CFRP). Alternatively, the sleeve body can on its outer surface with a metallic coating forming the surface of the sleeve be provided. It is useful for this, for example to steam the sleeve body with suitable metal. Either the application of the conductive lacquer as well as the application of a metallic coating allow existing ones Retrofit sleeves for flexographic printing and in a sleeve service should subsequently be made conductive.
Die elektrische Leitfähigkeit der Hülse kann alternativ auch dadurch erzielt werden, daß der Hülsenkörper aus einem Verbundwerkstoff mit elektrisch leitfähigen, ein Geflecht von Verbindungselemente bildenden Einlagen besteht. In bevorzugter Ausgestaltung kann hierzu der Hülsenkörper aus einem metallfaser- oder kohlenfaserverstärkten Kunststoff (CFK) bestehen, wobei bei der Herstellung der Hülse dafür Sorge zu tragen ist, daß sich die Einlagen bzw. Fasern nicht nur axial, sondern auch radial von der Kontaktfläche bis zur Oberfläche erstrekken.The electrical conductivity of the sleeve can alternatively also can be achieved in that the sleeve body made of a composite material with electrically conductive, a braid of Inserts forming connecting elements. In preferred For this purpose, the sleeve body can be made from a metal fiber or carbon fiber reinforced plastic (CFRP), care must be taken when manufacturing the sleeve, that the deposits or fibers are not only axial, but also extend radially from the contact surface to the surface.
Eine vollständig aus CFK bestehende Hülse ist nur bei geringen Wandstärken bis etwa 5 mm montierbar. Bei größeren Wandstärken ist in der Regel, bereits um das Weiten der Hülse für die Montage bzw. Demontage zu gewährleisten, der Hülsenkörper mit wenigstens einer Schicht aus nicht leitendem kompressiblen Material versehen. Bei derartigen Hülsen ist erfindungsgemäß vorgesehen, daß die Schicht aus nicht leitendem Material von dem Element zur Ableitung elektrostatischer Aufladungen durchgriffen ist. Bei der bevorzugten Ausführungsform einer Hülse mit einer nicht leitenden, zylindrischen Schicht bzw. Zwischenschicht ist das Element in einer radial sich erstreckenden Ausnehmung im Hülsenkörper angeordnet. Die Ausnehmung kann hierbei insbesondere von einer Radialbohrung gebildet werden. Damit das Ableitelement für die elektrostatische Aufladung nicht die Kompressibilität der Schicht aus nicht leitendem Material behindert, ist bei dieser Ausführungsform besonders günstig, wenn das Element seine Länge in Radialrichtung ändern kann und sich selbständig nach der Montage auf die zur elektrischen Verbindung notwendigen Länge einstellt. Dies kann vorzugsweise dadurch erreicht werden, daß das Element einen federbelasteten Kontaktkörper aufweist. Besonders vorteilhaft ist dann, wenn der Kontaktkörper derart angeordnet ist, daß er vor der Montage über die Innenseite des Hülsenkörpers hinausragt. Mit der Feder wird mithin der Kontaktkörper in Richtung auf die Innenseite der Hülse zu vorgespannt, also im Montagezustand gegen die Walzenaußenwand der Tragwalze gepreßt, so daß die elektrisch leitende Verbindung zwischen der leitfähigen Oberfläche der Hülse und der elektrisch leitenden Tragwalze gewährleistet ist. Um die Montage der Hülse zu erleichtern und Blockierungen der Aufschiebebewegung an dem Element zu verhindern, ist es von Vorteil, wenn der Kontaktkörper von einer Kugel gebildet ist oder zumindest ein kugeliges Kontaktende aufweist.A sleeve made entirely of CFRP is only small Wall thicknesses up to 5 mm can be installed. With larger wall thicknesses is usually already to widen the sleeve for assembly to ensure or disassembly, the sleeve body with at least a layer of non-conductive compressible material Mistake. In such sleeves, the invention provides that the layer of non-conductive material from the Element for dissipating electrostatic charges penetrated is. In the preferred embodiment, a sleeve with a non-conductive, cylindrical layer or intermediate layer is the element in a radially extending Recess arranged in the sleeve body. The recess can here are formed in particular by a radial bore. So that the discharge element for electrostatic charging not the compressibility of the layer of non-conductive material is disabled in this embodiment is special favorable if the element change its length in the radial direction can and independently after assembly on the electrical Connection sets the necessary length. This can preferably be achieved in that the element spring-loaded contact body. Particularly advantageous is when the contact body is arranged such that it protrudes beyond the inside of the sleeve body before assembly. With the spring, the contact body is thus in the direction pre-tensioned on the inside of the sleeve, i.e. in the assembled state pressed against the outer roller wall of the support roller, so that the electrically conductive connection between the conductive Surface of the sleeve and the electrically conductive support roller is guaranteed. To facilitate the assembly of the sleeve and blocking of the deferral movement on the element prevent, it is advantageous if the contact body of a Ball is formed or at least a spherical contact end having.
Um das Element auf einfache Weise in Hülsen einbauen zu können, kann es ein elektrisch leitfähiges Gehäuse z.B. aus Metall aufweisen, welches die Feder und den Kontaktkörper aufnimmt und mit seinem Gehäuseboden mit der leitfähigen Oberfläche verbunden ist. Wie eingangs dargelegt, können auch bereits vorhandene Hülsen bzw. Hülsenkörper nachträglich leitfähig gemacht werden. Hierzu kann insbesondere ein Hülsenkörper aus nicht leitendem Material nachträglich mit wenigstens einer radialen Durchgangsbohrung versehen werden, in die ein Element zur elektrostatischen Ableitung vor dem Auftragen der leitfähigen Oberfläche eingesetzt wird. Das Element kann in die Durchgangsbohrung bzw. die Ausnehmung insbesondere eingeschraubt oder eingeklebt sein. Ferner ist günstig, wenn die Aussparung bzw. Durchgangsbohrung an der Innenseite des Hülsenkörpers angesenkt ist, so daß das bei der Montage bzw. Demontage der Hülse zwischen der Innenseite des Hülsenkörpers und der Tragwalze entstehende Luftkissen nicht zu einem Versetzen oder Lösen des Elementes bzw. seines Gehäuses führen kann.In order to be able to easily install the element in sleeves, can it be an electrically conductive housing e.g. made of metal have, which receives the spring and the contact body and with its case bottom with the conductive surface connected is. As stated at the beginning, can already existing sleeves or sleeve bodies subsequently made conductive become. In particular, a sleeve body can be made of this non-conductive material subsequently with at least one radial Through hole are provided in which an element for electrostatic discharge before applying the conductive Surface is used. The item can be in the Through hole or the recess in particular screwed or be glued in. It is also advantageous if the Recess or through hole on the inside of the sleeve body is lowered so that during assembly or disassembly the sleeve between the inside of the sleeve body and air cushions created by the support roller do not move or loosen the element or its housing can.
Um einen gleichmäßigen Rundlauf der Hülse zu gewährleisten und/oder um bei großflächigen Hülsen eine vollständige Ableitung der entstehenden elektrostatischen Aufladung zu gewährleisten, können mehrere Elemente zur Ableitung der elektrostatischen Aufladung insbesondere rotationssymmetrisch angeordnet sein.To ensure that the sleeve runs evenly and / or for complete derivation in the case of large-area sleeves to ensure the resulting electrostatic charge, can use several elements to discharge the electrostatic Charging arranged in particular rotationally symmetrical his.
Die Kontaktzone muß nicht zwangsläufig an der Innenseite der Hülse liegen. Die meisten Tragwalzen sind mit einem Zentriervorsprung für die Registereinstellung versehen, an dem sich die Hülse bei der Montage mit einer Zentrieraussparung zentriert. Bei derartigen Tragwalzen kann daher die Kontaktzone Bestandteil der Zentrieraussparung sein, wobei sich der weitere Vorteil ergibt, daß die Kompressibilität der Zwischenschicht nicht beeinflußt wird. Um den Kontakt der Kontaktzone mit dem Zentriervorsprung sicher zu gewährleisten, können in der Zentrieraussparung federbelastete Kontaktelemente vorgesehen werden. The contact zone does not necessarily have to be on the inside of the Sleeve lying. Most of the support rollers have a centering projection for the register setting on which the sleeve is centered with a centering recess during assembly. In such support rollers, the contact zone can therefore Be part of the centering recess, with the other The advantage is that the compressibility of the intermediate layer is not affected. To contact the contact zone to ensure with the centering projection, in the centering recess is provided with spring-loaded contact elements become.
Weiter alternativ kann der Hülsenkörper als Element für die elektrostatische Ableitung wenigstens eine Sehne aus leitfähigem Material, insbesondere aus Metall, aufweisen.Further alternatively, the sleeve body can be used as an element for the electrostatic discharge at least one tendon made of conductive Material, in particular made of metal.
Die Erfindung wird nun anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung erläutert. In der Zeichnung zeigen:
- Fig. 1
- einen Längsschnitt durch eine Hülse nach einem erfindungsgemäßen Ausführungsbeispiel;
- Fig. 2
- schematisch eine Stirnansicht der Hülse aus Fig. 2; und
- Fig. 3
- schematisch und ausschnittsweise die Hülse aus Fig. 1, montiert auf einer Tragwalze einer Flexodruckmaschine.
- Fig. 1
- a longitudinal section through a sleeve according to an embodiment of the invention;
- Fig. 2
- schematically an end view of the sleeve of Fig. 2; and
- Fig. 3
- schematically and in sections the sleeve of Fig. 1, mounted on a support roller of a flexographic printing machine.
In den Figuren ist mit Bezugszeichen 10 eine Hülse für den
Flexodruck bezeichnet, die nach dem Luftkissenprinzip auf einer
ausschließlich in Fig. 3 dargestellten, als Luftzylinder
ausgeführten Tragwalze 1 einer weiter nicht gezeigten Flexodruckmaschine
montierbar ist. Die Hülse 10 hat einen zylindrischen
Hülsenkörper 2 mit mehrschichtigem Aufbau. Bei der Hülse
10 kann es sich insbesondere um eine sogenannte build-up Sleeve
handeln. Der Hülsenkörper 10 kann z.B. eine Basishülse aus
glasfaserverstärktem Kunststoff aufweisen, die mit mehreren
Schichten, wie kompressiblem Weichschaum, LD-Vergußmasse,
Hartschaum und einer Hartcoat- oder Softcoat-Deckschicht, versehen
ist. Nach der Auswahl der Deckschicht richtet sich dann
die Art und die Befestigung der zum Drucken verwendeten, nicht
dargestellten Druckformen. In the figures,
Im gezeigten Ausführungsbeispiel besteht der Hülsenkörper 2
entweder vollständig aus elektrisch nicht leitendem Material,
oder der Hülsenkörper 2 weist eine durchgehende Zwischenschicht
aus elektrisch nicht leitendem Material auf, die eine
Isolierung zwischen der Außenseite 3 des Hülsenkörpers 2 und
seiner Innenseite 4 bewirkt. Auf die Außenseite 3 des Hülsenkörpers
2 ist erfindungsgemäß eine Schicht 5 aus elektrisch
leitfähigem Material aufgebracht. Bei der Schicht 5 kann es
sich z.B. um eine aufgedampfte Metallbeschichtung oder um einen
Leitlack handeln. Aufgrund der Schicht 5 hat die Hülse 10
über den gesamten Umfang und ihre gesamte Axiallänge eine
elektrisch leitfähige Oberfläche 6.In the exemplary embodiment shown there is the
Im Hülsenkörper 2 ist wenigstens ein insgesamt mit Bezugszeichen
20 bezeichnetes Element zur Ableitung elektrostatischer
Aufladungen von der Oberfläche 6 der Hülse 10 an ihre Innenseite
4 vorgesehen. Das Element 20 ist in einer Radialbohrung
23 im Hülsenkörper 2 angeordnet, die an der Innenseite 4 des
Hülsenkörpers 2 offen ist und zur Außenseite hin von der elektrisch
leitfähigen Schicht 5 überdeckt wird. Das Element 20
umfaßt einen hier als Kugel 21 dargestellten Kontaktkörper,
der mit einer Feder 22 in Richtung der Innenseite 4 der Adapterhülse
vorgespannt ist. Kugel 21 und Feder 22, die beide
elektrisch leitfähig sind, sind in einem weiter nicht dargestellten,
elektrisch leitenden Gehäuse angeordnet, welches in
die Radialbohrung 23 eingesetzt ist. Im nichtmontierten Zustand
der Hülse 10, wie in den Fig. 1 und 2 gezeigt, ragt die
Kugel 21 mit einem Teil ihrer Oberfläche über die Innenseite 4
des Hülsenkörpers 2 hinaus. Das Gehäuse und die zugehörige Radialbohrung
23 sind jedoch derart ausgelegt, daß die Kugel 21
durch Aufbringen einer Kraft in Radialrichtung vollständig in
den Hülsenkörper 2 eintauchen kann. Diese Kraft in Radialrichtung
entsteht zwangsläufig nach der Montage der Hülse 10 auf
der Tragwalze 1, wie Fig. 3 zeigt. In the
Der Abschlußbund des Gehäuses ist vorzugsweise derart angeordnet,
daß er nicht bis an die Innenseite 4 des Hülsenkörpers 2
heranreicht. Ferner sollte die Durchgangsbohrung 23 mit einer
Ansenkung oder einer Stufe versehen sein, um bei der Hülsenmontage
auf der Tragwalze 1 ein Lösen oder Versetzen des Elementes
20 durch das Luftkissen zu verhindern.The end collar of the housing is preferably arranged in such a way
that it is not up to the
Fig. 3 zeigt die Hülse 10 in montiertem Zustand auf der Tragwalze
1. Da die Innenseite 4 der Hülse 10 und die Walzenaußenwand
7 der Tragwalze 1 zylindrisch sind, entsteht über die
volle axiale Länge eine Kontaktzone zwischen Hülse 10 und
Tragwalze 1. Das Luftsystem der Tragwalze 1 ist nicht dargestellt.
Wie in Fig. 3 gut zu erkennen ist, taucht die Kugel 21
vollständig in die Radialbohrung 23 ein, wird jedoch mittels
der Feder 22 gegen die Walzenaußenwand 7 der Tragwalze 1 gedrückt.
Elektrostatische Aufladungen werden über die Oberfläche
6 bzw. die Schicht 5, die Feder 22 und die Kugel 23 zur
Außenwand 7 der Tragwalze 1 weitergeleitet und von dort über
den Mantel der Tragwalze 1, wie mit der Linie 8 in Fig. 3 symbolisch
verdeutlicht, aus allen Druckwerken abgeleitet.Fig. 3 shows the
Das in den Figuren gezeigte Ausführungsbeispiel ist nur beispielhaft und soll den Schutzbereich der angemeldeten Erfindung nicht beschränken. Die Erfindung kann bei neuen Hülsen verwirklicht werden. Das Element zur Ableitung elektrostatischer Aufladungen kann auch nachträglich in bereits bestehende Hülsen aus nicht leitendem Material eingebaut werden. Vom Erfindungsgedanken umfaßt wird daher auch ein Verfahren, mit welchem Hülsen nachträglich leitfähig gemacht werden können, indem die Außenseite mit einer elektrisch leitfähigen Schicht versehen wird und in den Hülsenkörper ein Element eingebaut wird, welches die elektrisch leitende Verbindung zwischen der Innenseite der Hülse und seiner Oberfläche gewährleistet. The embodiment shown in the figures is only an example and is intended to protect the scope of the registered invention not restrict. The invention can be applied to new sleeves be realized. The element for discharging electrostatic Charges can also be added to existing ones Sleeves made of non-conductive material can be installed. From the idea of the invention therefore also includes a method with which sleeves can subsequently be made conductive, by covering the outside with an electrically conductive layer is provided and an element is installed in the sleeve body which is the electrically conductive connection between the Guaranteed inside of the sleeve and its surface.
Schließlich ist die Erfindung auch nicht darauf beschränkt, daß die Hülse unmittelbar auf dem Luftzylinder angeordnet ist. In den Schutzbereich der anhängenden Ansprüche sollen daher auch Ausführungsformen fallen, bei welcher die Hülse unter Zwischenlage einer sogenannten Adapterhülse auf dem Luftzylinder einer Druckmaschine montierbar ist. Bei der Ausführungsform mit Adapterhülse ist entweder die Adapterhülse elektrisch leitfähig und das Element befindet sich an der Kontaktzone zwischen der Innenseite der Hülse und der Außenseite der Adapterhülse, oder die Adapterhülse ist elektrisch nicht leitfähig und das Element zur Ableitung elektrostatischer Aufladungen erstreckt sich bis zur Walzenaußenwand der Tragwalze. Ferner kann auch in der Adapterhülse ein entsprechend der Erfindung die Ableitung der elektrostatischen Aufladung bewirkendes Element angeordnet sein.Finally, the invention is also not limited to that the sleeve is arranged directly on the air cylinder. Therefore, are intended to fall within the scope of the appended claims also fall in embodiments in which the sleeve Intermediate layer of a so-called adapter sleeve on the air cylinder a printing press is mountable. In the embodiment with the adapter sleeve, either the adapter sleeve is electrical conductive and the element is at the contact zone between the inside of the sleeve and the outside of the adapter sleeve, or the adapter sleeve is not electrically conductive and the element for dissipating electrostatic charges extends to the outer roller wall of the carrier roller. Further can also be in the adapter sleeve according to the invention dissipation of the electrostatic charge causing element be arranged.
Claims (21)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20204412U | 2002-03-19 | ||
DE20204412U DE20204412U1 (en) | 2002-03-19 | 2002-03-19 | Sleeve for flexographic printing |
DE10243183 | 2002-09-11 | ||
DE10243183A DE10243183C1 (en) | 2002-03-19 | 2002-09-11 | Sleeve for use on flexoprinting machines comprises an electrically conductive surface which is joined to a contact zone on the sleeve carrier cylinder via an electrically conductive unit accommodated in the sleeve body |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1346846A2 true EP1346846A2 (en) | 2003-09-24 |
EP1346846A3 EP1346846A3 (en) | 2004-09-08 |
EP1346846B1 EP1346846B1 (en) | 2005-08-03 |
Family
ID=27789758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03004728A Expired - Lifetime EP1346846B1 (en) | 2002-03-19 | 2003-03-04 | Sleeve for flexographic printing |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1346846B1 (en) |
JP (1) | JP2003291298A (en) |
AT (1) | ATE301044T1 (en) |
DE (1) | DE10261955A1 (en) |
ES (1) | ES2243820T3 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005067364A2 (en) * | 2004-01-15 | 2005-07-28 | Windmöller & Hölscher Kg | Printing cylinder with a plastic sleeve containing carbon fibers |
WO2019115699A1 (en) | 2017-12-13 | 2019-06-20 | Flint Group Germany Gmbh | Pneumatically clamping adapter |
EP3640031A1 (en) | 2018-10-17 | 2020-04-22 | Flint Group Germany GmbH | Cylinder with movable pin |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4493256A (en) * | 1984-02-29 | 1985-01-15 | American Roller Company | Voltage applicator for limiting charge distribution in ESA printing equipment |
EP0791477A2 (en) * | 1996-02-22 | 1997-08-27 | Praxair S.T. Technology, Inc. | Sleeve for a liquid transfer roll and method for producing it |
EP0943432A1 (en) * | 1998-02-23 | 1999-09-22 | Jeanette Scherf | Printing cylinder with a core and a sleeve thereon |
EP0955160A2 (en) * | 1998-05-07 | 1999-11-10 | Saueressig Gmbh & Co. | Process for the fabrication of a sleeve , especially for the printing industrie |
DE19944136A1 (en) * | 1998-11-05 | 2000-05-11 | Sogewa Walzen Sonnwald Gmbh | Printing roll or printing roll sleeve comprises polyurethane coating with specified thickness and Shore hardness provided on its surface with endless printing pattern produced by laser engraving |
-
2002
- 2002-09-11 DE DE10261955A patent/DE10261955A1/en not_active Withdrawn
-
2003
- 2003-03-04 ES ES03004728T patent/ES2243820T3/en not_active Expired - Lifetime
- 2003-03-04 EP EP03004728A patent/EP1346846B1/en not_active Expired - Lifetime
- 2003-03-04 AT AT03004728T patent/ATE301044T1/en not_active IP Right Cessation
- 2003-03-17 JP JP2003071543A patent/JP2003291298A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4493256A (en) * | 1984-02-29 | 1985-01-15 | American Roller Company | Voltage applicator for limiting charge distribution in ESA printing equipment |
EP0791477A2 (en) * | 1996-02-22 | 1997-08-27 | Praxair S.T. Technology, Inc. | Sleeve for a liquid transfer roll and method for producing it |
EP0943432A1 (en) * | 1998-02-23 | 1999-09-22 | Jeanette Scherf | Printing cylinder with a core and a sleeve thereon |
EP0955160A2 (en) * | 1998-05-07 | 1999-11-10 | Saueressig Gmbh & Co. | Process for the fabrication of a sleeve , especially for the printing industrie |
DE19944136A1 (en) * | 1998-11-05 | 2000-05-11 | Sogewa Walzen Sonnwald Gmbh | Printing roll or printing roll sleeve comprises polyurethane coating with specified thickness and Shore hardness provided on its surface with endless printing pattern produced by laser engraving |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005067364A2 (en) * | 2004-01-15 | 2005-07-28 | Windmöller & Hölscher Kg | Printing cylinder with a plastic sleeve containing carbon fibers |
WO2005067364A3 (en) * | 2004-01-15 | 2006-10-05 | Windmoeller & Hoelscher | Printing cylinder with a plastic sleeve containing carbon fibers |
WO2019115699A1 (en) | 2017-12-13 | 2019-06-20 | Flint Group Germany Gmbh | Pneumatically clamping adapter |
US11203197B2 (en) | 2017-12-13 | 2021-12-21 | Flint Group Germany Gmbh | Pneumatically clamping adapter sleeve |
EP3640031A1 (en) | 2018-10-17 | 2020-04-22 | Flint Group Germany GmbH | Cylinder with movable pin |
WO2020078979A1 (en) | 2018-10-17 | 2020-04-23 | Flint Group Germany Gmbh | Cylinder with movable pin, and mounting and dismounting method |
Also Published As
Publication number | Publication date |
---|---|
DE10261955A1 (en) | 2003-11-13 |
EP1346846A3 (en) | 2004-09-08 |
JP2003291298A (en) | 2003-10-14 |
ES2243820T3 (en) | 2005-12-01 |
ATE301044T1 (en) | 2005-08-15 |
EP1346846B1 (en) | 2005-08-03 |
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